uint8_t TM_I2C_DMA_Transmitting(I2C_TypeDef* I2Cx) {
/* Get I2C settings */
TM_I2C_DMA_INT_t* Settings = TM_I2C_DMA_INT_GetSettings(I2Cx);
/* Check if TX or RX DMA are working */
return (
Settings->RX_Stream->NDTR || /*!< RX is working */
Settings->TX_Stream->NDTR || /*!< TX is working */
I2C_IS_BUSY(I2Cx) /*!< I2C is busy */
);
}
// inicializa I2C na UCB0
// P3.2 e P3.1
I2C_STATUS i2c_init_module(void){
// desable i2c module
UCB0CTL1 = UCSWRST;
// config ports
I2C_PORTS_CFG();
// clock MSCLK
UCB0CTL0 = UCMST + UCMODE_3 + UCSYNC;
// I2CMODE
UCB0CTL1 = UCSSEL1 | UCSWRST;
// baudrate
// fbaud = FBRclk / UCBRx
// 0x640 = 10kbps
// 0xA0 = 100kbps
// 0x28 = 400kbps
#ifdef I2C_LOW_SPEED // 10k
UCB0BR0 = 0x40;
UCB0BR1 = 0x06;
#else
#ifdef I2C_HIGH_SPEED // 400k
UCB0BR0 = 0xA0;
UCB0BR1 = 0x00;
#else // 100k
UCB0BR0 = 0x28
UCB0BR1 = 0x00;
#endif
#endif
// libera o reset
UCB0CTL1 &= ~UCSWRST;
if(I2C_IS_BUSY()){
I2C_SET_SLAVE_ADDR(0);
I2C_START_TRANSMIT();
I2C_GENERATE_NACK();
I2C_GENERATE_STOP();
}
#ifdef __I2C_TEST
delayms(10);
UCB0I2CSA = 0x68;
I2C_START_TRANSMIT();
I2C_GENERATE_STOP();
#endif // __I2C_TEST
return I2C_STAT_DONE;
}
